Kröber O2 Technical Information
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Kröber O2 Technical Information

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  • Page 1 Technical information Kröber O2...
  • Page 2 Kröber O2 © Kröber Medizintechnik GmbH Salzheck 4 D-56332 Dieblich Germany Tel.: +49 (0) 2607 9404 0 Fax: +49 (0) 2607 9404 22 E-mail: info@kroeber.de Internet: www.kroeber.de TD070109 R5 23.12.2020...

  • Page 3: Table Of Contents

    2.1 Version with Camozzi functional unit................7 2.2 Version with SMC functional unit .................. 8 3. Service work ........................9 3.1 Opening the Kröber O2 ....................9 3.2 Closing the Kröber O2 ....................10 3.3 The functional units ..................... 11 3.3.1 The Camozzi functional unit .................
  • Page 4 Kröber O2 3.7.1 Removing the mains power cord ................52 3.7.2 Installation of the mains power cable ..............53 4. Maintenance ........................54 4.1 Safety check, semi-annually ..................54 4.2 Filter change ....................... 55 4.2.1 Coarse dust filter ....................55 4.2.2 Device input filter ....................

  • Page 5: Preliminary Remark

    It only applies in conjunction with the Kröber O2 Instructions for Use. The Kröber O2 is equipped with a humidifier on the unit side as standard. If desired, a humidifier close to the patient can also be selected as an option The following minimum performance data apply to the Kröber O2 oxygen concentrator:...

  • Page 6: Device Identification

    1.3 Device identification The year of manufacture of the Kröber O2 can be derived from the serial number. The silver type plate is located on the rear side above the coarse dust filter and has the following format Here YYMM is the coding for year and month, e.g.

  • Page 7: Structure

    Kröber O2 Structure 2. Structure 2.1 Version with Camozzi functional unit In the opened device you can see the assemblies a. Control board b. Functional unit Camozzi c. Compressor d. Fan and the components e. Capacitor Power cable...

  • Page 8: Version With Smc Functional Unit

    Kröber O2 Structure 2.2 Version with SMC functional unit In the opened device you can see the assemblies and components a. Control board b. Functional unit SMC c. Power cable d. Compressor e. Capacitor...

  • Page 9: Service Work

    Be sure to disconnect the power plug before opening the device. NOTE! To simplify work on the Kröber O2, it is advisable to place the device on a clean surface. Any humidifier that may be screwed on must be completely emptied or dismantled.

  • Page 10: Closing The Kröber O2

    Kröber O2 Service work 3.2 Closing the Kröber O2 NOTE! Closing the Kröber O2 is most easily done with a device placed on its side. 1. Carefully replace the gray housing cover and ensure that the cover is correctly latched.

  • Page 11: The Functional Units

    Kröber O2 Service work 3.3 The functional units 3.3.1 The Camozzi functional unit The Camozzi functional unit integrally includes the following components as a module: • Molecular sieve 1 and 2 • Exhaust silencer • Oxygen reservoir • 3 Valves •...

  • Page 12: Removing The Camozzi Functional Unit

    Kröber O2 Service work 3.3.2 Removing the Camozzi functional unit 1. Disconnect the red connector of the valve control line from the control board. 2. Loosen the cable tie on the EMC core with side cutters. NOTE! It is normal that a slight popping...
  • Page 13 Kröber O2 Service work 4. Press the edge of the plug-in connection on the gas outlet of the functional unit evenly and pull out the hose. 5. Lift the functional unit halfway straight up 6. Press the edge of the push-in...

  • Page 14: Installation Of The Camozzi Functional Unit

    Kröber O2 Service work 3.3.3 Installation of the Camozzi functional unit 1. Remove the three protective caps from the inputs and outputs of the functional unit. 2. Insert the plug-in hose for the pressure sensor into the connection on the functional unit as far as it will go.
  • Page 15 Kröber O2 Service work 4. When inserting, make sure that the exhaust silencer is correctly inserted into the corresponding housing gap. 5. In the correct end position, the discharge silencer is directly in front of the compressor. 6. In the correct end position, the head of the functional unit is caught by a stop (see circle).
  • Page 16 Kröber O2 Service work 7. Reconnect the plug-in hose of the product gas outlet as far as it will 8. Insert the plug-in hose into the air inlet of the functional unit as far as it will go. 9. Attach EMC core to cooling coil...
  • Page 17 Kröber O2 Service work 10. Plug the red connector of the valve control line onto the connector of the control board. Observe the polarity. The pin must point to the black tub connector. 11. Push the plug on with feeling as far as it will go.

  • Page 18: The Smc Functional Unit

    Kröber O2 Service work 3.3.4 The SMC functional unit The SMC functional unit contains - discretely interconnected - the following components: • Molecular sieve right and left • the 4-fold valve block • the flush valve...

  • Page 19: Removing The Smc Functional Unit

    Moderate force is required for this. NOTE! It is normal that a slight popping noise may occur due to any excess pressure still present in the hose. 3. Pull the O2 output hose of the functional unit off the L- connector by hand.
  • Page 20 Kröber O2 Service work 4. Compress the upper and lower clamps on the compressed air inlet and outlet of the 4-way valve block with a pair of combination pliers and slide them to the right onto the hose. Thus release the locking device.
  • Page 21 Kröber O2 Service work 7. Before pulling out, make sure that the individual components are only plugged in and not screwed together. Therefore, grasp the entire unit with both hands at the top and bottom. Pull out the functional unit.

  • Page 22: Installation Of The Smc Functional Unit

    Kröber O2 Service work 3.3.6 Installation of the SMC functional unit 1. Carefully insert the functional unit into the shaft and push it through to the end. When doing so, push any hoses present from the interior to the side to allow a free path.
  • Page 23 3. Use the combination pliers to spread both hose clamps and push them back over the connection pieces. 4. Push the O2 output of the functional unit onto the angle connector. 5. Place both electrical 8-pin and 2- pin connectors on the connector strips on the control board.

  • Page 24: Replacing The Molecular Sieves

    Kröber O2 Service work 3.3.7 Replacing the molecular sieves Notice! Molecular sieves should only be exchanged in pairs! There is both a left and a right molecular sieve which must be exchanged functionally identical! 1. Removing the SMC functional unit (see 3.3.5) 2.
  • Page 25 Kröber O2 Service work 3. Pull off the two lower silicone tubes one after the other from a molecular sieve 4. Unfasten the clamp at the 4-way- manifold and move in into the direction of the sieve bed...
  • Page 26 Kröber O2 Service work 5. Pull off the 4-way-manifold from the sieve bed. 6. Replace this sieve bed by a new one. Pay attention to the correct marking L or R. 7. Re-install all tubings ând clamps and on this part in reverse order 8.

  • Page 27: Control Board

    Kröber O2 Service work 3.4 Control board Variant Introduction Change history as of 2005 Initial design, 6-fold connection strip Long sensor from 2007 with additional temperature fuse. 8-fold connection strip 2 pressure sensors from 2014 with optocoupler for USB from 2018...

  • Page 28: Removal Of The Control Board

    Kröber O2 Service work 3.4.1 Removal of the control board Attention! The control board contains sensitive electronic circuits. Compliance with ESD protection measures is mandatory! 1. Disconnect all strands at the terminal strip of the control board. The strands are numbered in ascending order to avoid confusion.
  • Page 29 Kröber O2 Service work 3. Expose the control board by bending back the entire wiring harness and air supply hose. 4. Pull out approx. half of the control board together with the housing insert and operating elements. 5. Pull off the connection hose from...
  • Page 30 Kröber O2 Service work 6. Pull out the control board completely, but do not put it down yet. 7. Pull off the silicone hose on the multifunction sensor. 8. Thread the temperature sensor out of the compressor compartment...
  • Page 31 Kröber O2 Service work 9. Completely remove the printed circuit board together with the housing insert. 10. pull off the two operating elements upwards 11. Turn the circuit board over and loosen the 5 fastening screws.
  • Page 32 Kröber O2 Service work 12. Store the printed circuit board separately and ESD-protected.

  • Page 33: Installation Of The Control Board

    Kröber O2 Service work 3.4.2 Installation of the control board Attention! The control board contains sensitive electronic circuits. Compliance with ESD protection measures is mandatory! Remove the printed circuit board from the transport packaging. 2. fasten the printed circuit board to the housing insert using 5 fastening screws.
  • Page 34 Kröber O2 Service work 3. turn over the printed circuit board and firmly attach the two control elements to the components. Unwind the temperature sensor line completely and thread it through the feedthrough into the compressor compartment. Slide the control board together with the...
  • Page 35 Kröber O2 Service work Push the silicone hose onto the free outlet of the multifunction sensor. Push the pressure measuring hose onto the pressure sensor. Push in the control board with the operating unit completely flush. NOTE! Make sure that the blue insert card with...
  • Page 36 Kröber O2 Service work Reattach the mains cable to the holding dome (see figure above right) using cable ties. 10. connect all wires to the terminal strip of the control board. The strands are numbered in ascending order to avoid confusion. Thereby mean: - No.

  • Page 37: The Fan

    Kröber O2 Service work 3.5 The fan 3.5.1 The fan 3.5.1.1 Fan removal 1. Disconnect the two left connection cables (marked with. 5 & 6 at PCB Vers. 1, from then on no. 7 & 8) of the fan at the terminal strip on the control board.
  • Page 38 Kröber O2 Service work 2. Loosen the cable tie on the wiring harness of the terminal strip, e.g. with a side cutter. 3. pull out the entire tray with fan and cooling coil up to halfway. If necessary, detach EMC core from cooling coil input with cable tie beforehand.
  • Page 39 Kröber O2 Service work 5. The mounting screws do not need to be unscrewed all the way, just enough to clear the fan. 6. The fan can now be removed from the device.

  • Page 40: Fan Installation

    Kröber O2 Service work 3.5.1.2 Fan installation 1. Install the fan so that the fan wheel or the airflow arrow points towards the sheet metal. 2. Tighten the four fastening screws hand-tight. 3. Press the fan panel back evenly into the grooves as far as it will go.
  • Page 41 Kröber O2 Service work 5. If necessary, reattach the EMC core to the silicone hose of the cooler outlet with a cable tie. 6. Screw the marked wires of the fan into the terminal strip (pos. 5 & 6 or 7&8).

  • Page 42: The Compressor

    Kröber O2 Service work 3.6 The compressor 3.6.1 The compressor model Gardner Denver 3.6.1.1 Compressor removal 1. Disconnect strands no. 5 and 6 of the compressor at the terminal strip of the control board.
  • Page 43 Kröber O2 Service work 2. Loosen the cable tie on the cable harness. 3. Pull the compressor cable through the grommet of the fan plate. 4. Disconnect the motor capacitor connection cable from the capacitor. 5. Pull the connection cable back through the grommet.
  • Page 44 Kröber O2 Service work 7. Using a screwdriver or similar, open the clamp on the compressor compressed air outlet and pull the hose off the nozzle. 8. Also disconnect the hose from the compressor inlet. 9. Pull the compressor together with the retaining plate out of the guide.

  • Page 45: Compressor Installation

    Kröber O2 Service work 3.6.1.2 Compressor installation 1. Thread the compressor together with the retaining plate into the guide and allow it to submerge by approx. 50%. 2. Guide the clamp over the pressure output hose of the compressor. 3. Guide the pressure outlet hose over the stainless steel nozzle.
  • Page 46 Kröber O2 Service work 6. Allow the compressor and retaining plate to slide in the guide as far as it will go. NOTE! Ensure that the side rubbers are guided correctly and without twisting! 7. Guide the compressor connection line through the grommet.
  • Page 47 Kröber O2 Service work 11. Secure the entire wiring harness to the hose again with a cable tie.

  • Page 48: The Compressor Model Tecwell (Or Gdt 2380)

    Kröber O2 Service work 3.6.2 The compressor model Tecwell (or GDT 2380) 3.6.2.1 Compressor removal 1. Loosen the cable ties on the electric compressor line. 2. Disconnect strands no. 5 and 6 of the compressor at the terminal strip of the control board.
  • Page 49 Kröber O2 Service work 3. Disconnect the two terminals on the capacitor. 4. Pull back the two condenser and compressor connection lines. 5. Loosen the hose clamp on the cooling coil using pinch pliers.
  • Page 50 Kröber O2 Service work 6. Pulling off the suction hose from the compressor. 7. Loosen the lower clamp on the 4-way valve block. Pulling off the hose. Pulling off the clamp. 8. Lifting the entire compressor plate...

  • Page 51: Compressor Installation

    Kröber O2 Service work 9. Pulling back the exhaust damper hose through the fan plate. 10. Pull the compressor plate completely out of the guide 3.6.2.2 Compressor installation 1. The compressor is installed in the reverse order to removal Hint!

  • Page 52: The Power Cord

    Kröber O2 Service work 3.7 The power cord 3.7.1 Removing the mains power cord 1. Disconnect wire #1 & #2 from the control board terminal block. The strands are numbered in ascending order to avoid confusion. 2. Loosen the two cable ties of the...

  • Page 53: Installation Of The Mains Power Cable

    Kröber O2 Service work 3. Completely unthread the power cord from the housing. 3.7.2 Installation of the mains power cable 1. Thread the bend protection of the mains cable into the corresponding recess on the underside of the housing. 2. Feed the power cable through...

  • Page 54: Maintenance

    4. Maintenance 4.1 Safety check, semi-annually When the Kröber O2 is used in the home, the manufacturer prescribes an annual safety check. Additional documents are made available to the service personnel for the safety check if they are required for repair, maintenance, etc. The procedure is in accordance with the STK protocol: ➔...

  • Page 55: Filter Change

    3. Dispose of the old filter. 4. Threading the new filter fleece. 5. Reinsert the filter cover into the back of the Kröber O2. 4.2.2 Device input filter Time interval: semi-annually by the technician, after 5000 h at the latest.

  • Page 56: Device Output Filter (Bacteria Filter)

    4.2.3 Device output filter (bacteria filter) The instrument outlet filter is located inside the instrument before the gas outlet of the instrument and filters particles >8µ. 1. Opening the Kröber O2. (see chapter 3.1) 2. Pull off both silicone hoses on...
  • Page 57 Kröber O2 Maintenance 4. Reinsert the new filter. Observe the direction of flow. The arrow on the filter must point away from the valve in the direction of the multifunction sensor. 5. Close the Kröber O2 again.

  • Page 58: Processing Recommendations

    Kröber O2 Processing recommendations 5. Processing recommendations Applies to accessories and consumables at six-monthly maintenance. 5.1 without change of patient Breathing gas humidifier (reusable): clean and disinfect Respiratory humidifier (n. reusable): dispose Breathing gas humidifier holder: clean and disinfect Hoses, nasal cannulae, masks, or the like: dispose of 5.2 With patient change...

  • Page 59: Functional Description

    If the O2 concentration in the product gas drops below 82%, the oxygen status alarm is triggered. If the O2 concentration in the oxygen tank drops below 60%, the oxygen deficiency alarm is triggered.

  • Page 60: Control Board

    Kröber O2 Functional description 6.2 Control board Block diagram...

  • Page 61: Integrated Protective Measures (Safety Concept According To Mopp)

    Kröber O2 Functional description Integrated protective measures (safety concept according to MOPP) The following protective measures have been integrated into the device: • The device has two input fuses, which are designed as fuses. In the event of overcurrent, such as in the event of a short circuit, these melt and interrupt the power supply to the device.
  • Page 62 Kröber O2 Functional description Peak operating voltage Touch point Protective measure to V_peak (U) the patient 212<U<354 A: Outer conductor/mains (L) to Two MOPP housing B: Outer conductor/mains (L) to Two MOPP patient connection C: Outer conductor/mains (L) to air...

  • Page 63: Pneumatic Diagram

    Kröber O2 Functional description 6.4 Pneumatic diagram 6.4.1 with Camozzi functional unit 6.4.2 with SMC functional unit...

  • Page 64: Abnormal Conditions And Their Correction

    Kröber O2 Abnormal conditions and their correction 7. Abnormal conditions and their correction 7.1 Alarm conditions Alarm category Description /LC display Temperature The operating temperature in the concentrator interior has risen alarm above 60°C. Countermeasures: • The device must be switched off immediately.
  • Page 65 NOTE! The power failure alarm is powered by an internal, maintenance-free capacitor. Oxygen The Kröber O2 oxygen concentrator is equipped with an innovative deficiency alarm multifunction sensor that monitors the oxygen concentration of the delivered oxygen. If this is less than 60%, then an oxygen deficiency alarm is triggered.
  • Page 66 Alarm category Description /LC display Oxygen status The Kröber O2 oxygen concentrator is equipped with an innovative alarm multifunction sensor that monitors the oxygen concentration of the delivered oxygen. If this is less than 82%, then an oxygen status alarm is triggered.
  • Page 67 Kröber O2 Abnormal conditions and their correction Alarm category Description /LC display Volume flow The delivered volume flow does not match the set one. alarm Countermeasures -Check if the oxygen hose is kinked or pinched. -Check if the accessories are connected correctly.

  • Page 68: Pc Service Program

    2. Install the driver for the USB interface by starting setup.exe in the destination folder. 3. Connect the Kröber O2 to the USB interface of your PC and on the concentrator. 4. Windows detects the new hardware and automatically installs the necessary drivers.

  • Page 69: Usage

    PC Service Program 8.2 Usage After start of the program, following screen will appear The following administrative information is displayed: - Serial number of the Kröber O2 - Serial number of the PCB - Operating hours - Software version In the middle and right column, the actual control parameters are displayed:...
  • Page 70 Open and close durations for sieve beds 1 and 2 In the lower right block, the current alarms are displayed (green: not active; red: active): O2 status, sensor, low volume flow, high volume flow, temperature, mains Below this information, five one-minute-traces are shown (from top to the bottom): •...

  • Page 71: Printable Report

    Kröber O2 PC Service Program 8.3 Printable Report The second folder allows you to create a maintenance and status report. It is possible to fill in patient and tester data. Check boxes are for the required maintenance procedures. One can print, save and open existing reports.

  • Page 72: Flight Recorder

    Kröber O2 PC Service Program 8.4 Flight recorder All Kröber O2 contain a flight recorder that might help to analyse the technical status of the unit. For this reason, the Kröber O2 will continuously store cumulated data in predefined interval.

  • Page 73: Appendix

    9. Appendix 9.1 Spare parts list Description Picture E- KRO2.20 Base housing Kröber O20, with • foam • O2 connector + internal hose • cable retainers blue cover foil for GDT compressor version E- KRO2.20- Base housing Kröber O20, with •...
  • Page 74 Kröber O2 Appendix Description Picture E-KRO2.21 Lid for Kröber O2 housing, with foam for GDT compressor version E-KRO2.21- Lid for Kröber O2 housing, with foam for Tecwell compressor version E-KRO2.22 Service Lid, with foam...
  • Page 75 Kröber O2 Appendix Description Picture E-KRO2.23 Slide-in module control elements • old version without LED hole with mounted handle E-KRO2.23- Slide-in module control elements • new version with LED hole • with mounted handle KRO2.24 Grip KRO2.25 Perspex panel • old version...
  • Page 76 Kröber O2 Appendix Description Picture KRO2.26 Printed card for Kröber E-KRO2.27 Turning knob for flow adjustment KRO2.28 Push button for main switch E-KRO2.29 Retainer for power supply cord • with 4 mounting screws...
  • Page 77 Kröber O2 Appendix Description Picture E-KRO2.30 Grid for coarse dust filter • with coarse dust filter E-KRO2.32 O2-connector UNF 9/16‘‘ mith screw KRO2.33 Castor...
  • Page 78 Kröber O2 Appendix Description Picture KRO2.33-B Castor with brake E-KRO2.34 Fan 230 Volt 50 Hz • without mounting foam • with connecting cable with 4 mounting screws KRO2.37-2 Check valve...
  • Page 79 Kröber O2 Appendix Description Picture E-KRO2.41 Aluminium sheet metal for lower airduct KR4.28 Support for airduct E-KRO2.50 Full Compressor module • version Gardner Denver Thomas (GDT) mounted with springs on base metal sheet...
  • Page 80 Kröber O2 Appendix Description Picture E-KRO2.50- Full Compressor module • version Tecwell • mounted with springs on base metal sheet with outlet muffler KRO2.55 Capacitor 10 µF für GDT compressor KRO2.55-R2 Capacitor 6 µF für Tecwell compressor...
  • Page 81 Kröber O2 Appendix Description Picture KRO2.55-R2 Capacitor 8 µF für Tecwell compressor E-KRO2.60-1 Thermal fuse 72° E-AEE.17 Thermal fuse 84°...
  • Page 82 Kröber O2 Appendix Description Picture KRO2.63 Power cord EU KRO2.63-2 Power supply CH plug KRO2.63-3 Power supply Taiwan plug KRO2.63-4 Power supply UK...
  • Page 83 Kröber O2 Appendix Description Picture KRO2.60 Main board Kröber • tested • with loudspeaker • no LED KRO2.60-R2 Main board Kröber • tested • no loudspeaker • with EMC shield • with LED...
  • Page 84 Kröber O2 Appendix Description Picture KRO2.60-A KRO2.60 fully assembled with slide-in module • without LED KRO2.60-A- KRO2.60-R2 fully assembled with slide-in module • with LED E-201.04-R3 Buzzer...
  • Page 85 Kröber O2 Appendix Description Picture E-KRO2.70 Functional unit for O2-production • model Camozzi E-KRO2.70- Functional unit for O2-production • model SMC...
  • Page 86 Kröber O2 Appendix Description Picture 201.43-R1 4-way-manifold SMC 201.42-R1 1-way-manifold SMC purge valve 201.07-L-R3 Sieve bed left, marked “L” 201.07-R-R3 Sieve bed right, marked “R”...
  • Page 87 Kröber O2 Appendix Description Picture AEE.45 Clamp...

  • Page 88: Emc Guidelines

    Guidelines and manufacturer's declaration - Electromagnetic compatibility, emission of interference The Kröber O2 is intended for operation in an environment as specified below. The operator of the Kröber O2 must ensure that it is operated in such an environment. Interference emission...

  • Page 89: Electromagnetic Compatibility, Immunity

    Guidelines and manufacturer's declaration - Electromagnetic compatibility, immunity to interference The Kröber O2 is intended for operation in an environment as specified below. The operator of the Kröber O2 must ensure that it is operated in such an environment. Electromagnetic...
  • Page 90 Kröber O2 Appendix Electromagnetic Immunity test IEC 60601 test level Compliance level environment - Guidelines calculated from the - equation applicable to the - transmit frequency. Recommended protective distance: d= 1.2 √P for 80 MHz to radiated RF 3 V/m...
  • Page 91 RF transmitters, a site survey is recommended. If the determined field strength at the location of the Kröber O2 exceeds the compliance level specified above, the Kröber O2 must be observed with respect to its normal operation at any application site. If unusual performance characteristics are observed, it may be necessary to take additional measures, such as reorienting or relocating the Kröber O2.

  • Page 92: Recommended Protective Distances

    Recommended protective distances between portable and mobile Kröber O2 Version 4.0 RF communication devices and the Kröber O2 is intended for operation in an electromagnetic environment in which radiated RF Kröber O2 can help prevent disturbances are controlled. The customer or the user of the electromagnetic interference by maintaining minimum distances between portable and mobile RF Kröber O2 as recommended below according to the...

  • Page 93: Explanation Of Symbols

    Kröber O2 Appendix 9.3 Explanation of symbols Symbol Meaning WARNING! General warning sign (according to ISO 7010-W001) WARNING! Electricity (according to ISO 7010-W001) Attention, follow the instructions in the operating manual. Applied part type BF Protection class II Notified body: TÜV Rheinland LGA Product Service...

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